=(100+2)x3.7
=100x3.7+2x3.7
=370+7.4
=377.4
102*3.7=100*3.7+2*3.7=370+7.4=377.4
3.5×102=3.5×(100+2)=350+7=3575/12×(1÷4/5-4/5÷1)=5/12×(5/4-4/5)=25/48-1/3=25/48-16/48=9/48
=（100+2）✘3.7
=100✘3.7+2✘3.7
=370+7.4
=377.4
102x3.7
=102x（3+0.7）
=102x3+102x0.7
=306+71.4
=377.4
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